lovecoding
/
Web1020


			
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        // 1.创建cookie
        function setCookie(name, value, day) {
            let timer = new Date();
            timer.setDate(timer.getDate() + day);
            document.cookie = `${name}=${value};expires=${timer.toUTCString()}`
        }
        // setCookie('school', '黑大', 3);
        // setCookie('userName', '张三', 3);
        // setCookie('age', '18', 3);

        // 2.获取cookie
        function getCookie(cookieName) {
            let cookieArr = document.cookie.split(';');
            for (let i = 0; i < cookieArr.length; i++) {
                let cookieKey = cookieArr[i].split("=")[0].trim();
                // cookieKey = cookieKey.trim();
                if (cookieKey === cookieName) {
                    // console.log(cookieArr[i].split("=")[1]);
                    return cookieArr[i].split("=")[1];
                }
            }
        }
        // console.log(getCookie('age'));
        
        // 3.删除cookie
        function removeCookie(cookieName) {
            // let timer = new Date();
            // timer.setDate(timer.getDate() - 1);
            // document.cookie = `${cookieName}=1;expires=${timer.toUTCString()}`

            setCookie(cookieName, 1, -1);
        }

        removeCookie('userName');


    </script>
</body>
</html>